Google unable to fetch sitemap

Hi,
I supplied my Route66 sitemap url in Google Search Console, but received the message "unable to fetch" from Google
I suspect this may have to do with either:
- my default Joomla robots.txt file blocking the components folder
- or Google not being able to find the sitemap.

Do you think I need to add the sitemap location configuration of the Route 66 extension in my robots.txt file? (Like this: "Sitemap: index.php?option=com....") If so, what is the exact location/url of the extension?

Kind regards,
Theo

Hi Lefteris,
thnx for your quick reply! Apparently this was a false alarm, Google has indexed my site now. I don't know why they gave this "unable to fetch" message, it's okay now.
Kind regards,
Theo